| A | B |
|---|
| Summit | top or peak |
| Volcanologist | a scientist who studies volcanoes. |
| Hotspot | a volcanic center, 60-120 miles accross and lasting for at least a few million years, where a rising plume of mantle material reaches the surface. |
| Magma | molten or melted rock |
| Plate Tectonics | the theory that the Earth's crust is broken into about 10 fragments or pieces which shift, forming new ocean crust, moing continents and causing volcanic eruption |
| Core | the central part of the Earth that is approximately 1800 |
| Mantle | the portion of the Earth lying between the core and the crust |
| Crust | the outer layer of the Earth |
| Caldera | the large crater formed by the collapse of a volcanoe's summit |
| Flank | the side of a volcano |
| Flank Eruption | an eruption from the flank |
| Magama Reservoir | a hole or cavity filled with magma inside a volcano |
| Rift Zone | a zone of volcani features marked by crack, faults, and vents |
| Vent | an opening in the Earth's surface through which volcanic materials are released |
| Shield Volcano | a gently sloping volcano in the shape of a solider's shield-built by lava flows |
